Its so sad that google only allows a good or bad option. This show was a 6/10 for me.
To put it summarily, it was good, but the pace was slow. It often felt draggy and a lot the script and cuts seem like the scriptwriters were intentionally trying to make the series longer.
The acting was good of course - David Tennant and Michael Sheen are undeniable among the best. But man it was draggy.
The fx used were what you'd expect for a series - so not great, though I don't blame them for that.